Containing apparatus and valve system therefor



Ci F. CROMMETT; I CONTAINING APPARATUS AND VALVE SYSTEM THEREFOR.

APPLICATION FILED MAY 26, I916.

' Patented Sept. 21, 1920.

grave-tor: a? 6 romme .9 7 s sub , ward movement 1 atmospheric air into NTED CHARLES F, OBOMMETT, OF CHELSEA, MASSACHUSETTS.

CONTAINING ATUS AND vALvn s'rsrnm 'rnnnnroa.

Specification of Letters Patent.

Patented Sept. 21, 1920.

Application filed May 26, 1916. Serial No. 100,121.

To all whom it may'concern Be it known that I, CHARLES F. CRoM METT, a citizen of the United States, and a resident of Chelsea, county of Su'flolk, and State of Massachusetts, have invented an Improvement in Containing Apparatus and Valve Systems Therefor, of which the fol-- lowmgdescription, in connection with the accompanying drawings, is a specification, like characters on the drawings representin like parts.

n the drawings, Figure 1 is an elevation showing the general relative position of the valve casing and protective cap; Fig. 2 is a sectional view showing the interior arrangement of the valve parts.

The specific illustrative embodiment of my invention here shown and described is a valve suitable for use as an outlet for gas or fluid .held under pressure in metallic containers. v

011s of the objects of my invention is to provide a valve whereby the entrance of the container may be prevented, and the exhausted container upon being returned to its filling station may be cup 12 is opposed by the coil spring 16 I which may be secured to 'th usual and suitable manner.

Penetrating the side of the valve bod a short distance above the threads 9 of the valve shank 8 is the screw 17 which is preferably provided with an irregularly shaped key-slot in its head to prevent its belng turned by-any implement other than akey made to fit it.

On the opposite e plug in any side of'the valve body ceive a protecting cap. hrough this nozzle the bore 18 connects with the interior or bore and with the outlet user of the gas permits the tank to become immediately refilled withoutthe necessity of being first pumped out to empty it of air which without. my invention would have passed into it following the exhaustion of the gas or-fluid it originally contained.

I have shown the main valve, body 1 screwed into the top of a gas or fluid container 2, and covered by a protecting cap 3 arranged to screw upon the flange 4 and provided at the top with the nut 5 to make it easily removable. 1 Upon the top of the valve bodyis screwed the usual nut 6 for retaining the packing 7 Through the center of the nut 6 fits .the valve shank 8 which is provided at its upper end.

with a squared portion 9 to permit its being turned by a wrenc The upper part of the valve shank '8 is smooth, but near its lower end it is provided withthreads 9 which fit correspondin threads in the-bore of the valve body. elow the threads 9 the valve shank is tapered as at 10 to make a ti ht closure against the shoulder 11 in the va ve ore.

Attached to a continuation of the valve shank is the cup.12 in which is slidably mounted the auxiliary plu' 13, the end of which is tapered at 14 to fi t snugly the up.- per orifice of the outlet bore 15. The u of the plug 13 within tl ie .waste of time and practically empty and equal in its interior pressure to the pressure of the atmosphere ,outside, with the result that air leaks into the tank through the open valve. This results-in the necessity for pumping out the empty containers before refilling them, a

is the nozzle 19, preferabl threaded 'to remixture of gas and air. still remaining in i the containers. This entails not only a waste of the gas,

power. In my valve here shown, however, the

plug 13 acts to prevent the'escape of any gas from the container after the pressure within the tank has been reduced to say one pound to the square inch, the ing of suificient strength'to lower pressure. Thus when within the container is reduced the bore 15, preventing the further escape of preventing any inlet of air spring 16 beovercome any the pressure to one pound gas, and also from the outside. I

The provision'of the screw 17 makes 1t impossible for the user to unscrew the .valve shank 8 to an extent suflicient to overcome the action of'the spring 16 and so withdraw the plug 13. l

Upon being refilled, the refilling apparatus is connected to the nozzle 19, the screw 17 is then retracted by turnin it with a suitable key, 9 1 12 9 Valve shit 8 screwed but also a considerable plug 13 closes the upper end of the outlet .normally exertmg closing pressure on said im urities. -&hile I have upwardly a sufiicient distanceto withdraw the plug 13 from itsseat in the upper aperture ofthe bore 15. The fresh gas then enters the container through the bore 18 and the container is thus refilled without the necessity of pumping out any air or other described one specific embodiment of my invention with particular reference to a valve for gas .or fluid holding containers, my invention is obviously not limited to the specific construction shown nor to the specific use designated; and many modifications of my invention might be reopened by. pressure of the gas when said main closureis open and gas is being discharged under pressure, and yielding means sup lemental closure and automatically cffective' to close the supplemental closure when the pressure of the gaseous contents of the container has been reduced to a predetermined pressure, whereb air is ex-' eluded from entrance into sai container.

' sup lemental closure an 2. In combination with a container for use in shipping gas under pressure, valve means .roviding a main closure, means for manual y opening and closing said main closure, a supplemental closure normally opened by pressure of the gas when said main closure is open and gas is being discharged under pressure, and yielding means normally exerting closin pressure on' said fect ve to close the supplemental closure when the pressure of the gaseous contents of the container has been reduced to a predetermined pressure, whereby air is excluded from entrance "into said container, said main closure means and said supplemental closure means bein 'operable at the same time to permit refil ing of said container.

'3. Portable Icontaining apparatus for use inshippin'g 01f storing compressed gas com- 7 'prlsin in combination, a receptacle having point.

a discar passage and valve mechanism for contrcfiling the egress of gas from said container through said discharge passage,

said mechanism comprising main closure means, and auxiliary flow-govermng means automaticallyioperative to close said passage, independently of closure of said main closure means, when the pressure within the receptacle I is reduced to a predetermined 4. Rechargeable containing apparatus for use in shipping or storing compressed gas automatically efcomprising, in combination, a receptacle having a isc anism controlling the egress of gas from said container through said discharge passage, said mechanism comprising main closure means and auxiliary flow-governing means automatically operative to close said passage independently of closure of said main closure means, when the pressure is reduced to a predetermined point, and means 'for reopening said auxiliary flow-governing means when the receptacle is to be recharged.

5. A valve comprising a casing with a tubular bore, said bore having a valve seat near its middle portion and a smaller valve seat at or nearits lower portion, a set-screw in the upper portion of said casing, a valve stem having a threaded portion, said setscrew projecting through said casin and overlapping the threaded portion oi said valve stem to limit the withdrawal of said stem, said stem having a conical portion to engage the upper valve seat, and terminating in a cylindrical-portion provided with a cy jndrical bore extending partly through. said 1 cylindrical portion, a cylindrical pin slidably mounted in the bore of said cylindrical portion and terminating in a' conical portion adapted to engagethe lower valve seat, and spring means for moving said pin in said bore, said spring being attached to said (iylindrical portion and to said pin.

. 6. echargeable containing apparatus for use in shipping or storin compressed gas comprisin in combinatlon, a receptacle having a ischarge passage and valve mechanism controlling the egress of gas from said container through said discharge passage, said mechanism comprising a yieldingly supported check valve normally automatically operative to 'close said discharge passage when the pressure in the container is reduced to a predetermined-point, 'sto means normally opposing opening of sai valve, manually operable stop-withdrawing meansand check valve opening means op erable on withdrawal of said stop means whereby said check valve may be opened to permit recharging of said container through said discharge passage.

7. Rechargeable containing apparatus for use in shipping or storingcompressed gas comprising, in combinat on, a receptacle having a discharge passage'and valve mechanism controlling the egress of gas from said container through said discharge passage, said mechanism comprising a main valve and harge passage and valve mechcheck a yieldingly supported check valve normally automatically operative to close said discharge passage when the pressure in the container is reduced to a predetermined point, stop means normally opposing openmg -of said check valve, manually operable stop-withdrawing means and check, valve opening means connected to said main valve which comprises providing a yieldingly pressed closure in the discharge passage of the contalner, the pressure on said closure permitting the egress of gas above a predetermined pressure while opposing such egress below said pressure, thereby at all times to retain a minimum amount of gas in the container, and holding sald closure open while forcing gas through said discharge,

passage in reverse direction to effect recharging of the container.

In testimony whereof, I havesigned my 20 name to this s ecificatlon.

' OH RLES F. GROMMETT. 

